Re watching the Graveyard Carz episode with hindsight being 20/20, it is painfully obvious that Don did in fact acknowledge Phantasm 5 was happening well over a month ago. Michael Baldwin asks Don "So when is Phantasm 5 coming out?" To which Don asks him "Are you up for it?" Mike says he is and then Don says the cryptic line: "From your mouth to the Tall Man's ears". There is a moment of stunned silence before one of the GC crew asks, "What, are you serious?", to which Don responded: "That's for you to figure out".